HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$123+ Cheap flights from Fresno to Ontario (FAT - ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
FAT — ONT
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Fresno to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Fresno to Ontario

Cheapest flights from Fresno to Ontario
Explore the most affordable flight options available from Fresno to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:31 pm
FAT
-
ONT
1 stop13h 32m
Multiple Airlines
Tue 7/213:40 pm
ONT
-
FAT
1 stop18h 07m
Multiple Airlines
Deal found 6/18$169
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:31 pm
FAT
-
ONT
1 stop25h 20m
Multiple Airlines
Wed 7/83:40 pm
ONT
-
FAT
1 stop23h 06m
Multiple Airlines
Deal found 6/18$212
This Kiwi.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:31 pm
FAT
-
ONT
1 stop13h 32m
Multiple Airlines
Wed 7/223:40 pm
ONT
-
FAT
1 stop23h 06m
Multiple Airlines
Deal found 6/19$239
This Kiwi.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/133:31 pm
FAT
-
ONT
1 stop16h 32m
Multiple Airlines
Thu 7/163:40 pm
ONT
-
FAT
1 stop21h 36m
Multiple Airlines
Deal found 6/20$251
This Kiwi.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/142:07 pm
FAT
-
ONT
1 stop17h 56m
Multiple Airlines
Thu 7/163:40 pm
ONT
-
FAT
1 stop21h 36m
Multiple Airlines
Deal found 6/20$255
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/133:31 pm
FAT
-
ONT
1 stop16h 32m
Multiple Airlines
Thu 7/2311:52 am
ONT
-
FAT
1 stop26h 49m
Multiple Airlines
Deal found 6/17$261
This Kiwi.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/126:46 pm
FAT
-
ONT
1 stop13h 17m
Multiple Airlines
Tue 7/141:38 pm
ONT
-
FAT
1 stop20h 09m
Multiple Airlines
Deal found 6/20$293
This Kiwi.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/126:46 pm
FAT
-
ONT
1 stop13h 17m
Multiple Airlines
Wed 7/153:40 pm
ONT
-
FAT
1 stop26h 16m
Multiple Airlines
Deal found 6/20$297
This Kiwi.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/106:31 pm
FAT
-
ONT
1 stop13h 32m
Multiple Airlines
Tue 7/143:40 pm
ONT
-
FAT
1 stop18h 07m
Multiple Airlines
Deal found 6/20$300

Find flight deals from Fresno to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Fresno (FAT) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$169
(Kiwi.com)

One-way from

$123
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$477
Provider with most accurate pricing for Fresno Airterminal-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Fresno Airterminal-Ontario flights.
Search Deals
From Fresno Airterminal to Ontario
Search Deals
One-way flight from Fresno Airterminal to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Fresno to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 21, 2026.
Use the filters below to find and compare flights from Fresno to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Fri 8/7

5:20 am-9:55 am

1 stop4h 35m

Ontario

Sat 8/8

2:55 pm-8:30 pm

1 stop5h 35m

$310

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Wed 9/2

2:10 pm-6:16 pm

1 stop4h 06m

Ontario

Sat 9/5

11:00 am-5:26 pm

1 stop6h 26m

$351

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 8/4

5:00 am-12:47 pm

1 stop7h 47m

Ontario

Sat 8/8

1:50 pm-5:28 pm

1 stop3h 38m

$351

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sat 7/25

6:25 am-1:40 pm

2 stops7h 15m

Ontario

Mon 7/27

6:35 pm-12:10 am

2 stops5h 35m

$357

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Thu 9/3

12:02 pm-6:11 pm

1 stop6h 09m

Ontario

Sat 9/5

1:56 pm-5:26 pm

1 stop3h 30m

$359

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Mon 10/26

6:20 am-12:20 pm

1 stop6h 00m

Ontario

Thu 10/29

1:33 pm-5:42 pm

1 stop4h 09m

$359
Quickest round-trip

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Fri 7/31

6:40 pm-10:37 pm

1 stop3h 57m

Ontario

Wed 8/5

1:50 pm-5:28 pm

1 stop3h 38m

$388

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Fri 7/10

5:25 am-10:10 am

1 stop4h 45m

Ontario

Mon 7/13

4:00 pm-11:10 pm

2 stops7h 10m

$392

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sat 7/11

5:25 am-12:45 pm

2 stops7h 20m

Ontario

Mon 7/13

4:40 pm-11:10 pm

2 stops6h 30m

$397

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sat 7/11

5:25 am-12:45 pm

2 stops7h 20m

Ontario

Sat 7/11

3:00 pm-9:35 pm

2 stops6h 35m

$397

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Fresno to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Fresno to Ontario in June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Fresno-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Fresno-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Fresno-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Fresno-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Fresno-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Fresno to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Fresno with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Fresno to Ontario

What is the cheapest month to book a flight from Fresno to Ontario?

Currently, January is the cheapest month in which you can book a flight from Fresno to Ontario (average of $81). Flying from Fresno to Ontario in August is currently the most expensive (average of $656). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated June 21, 2026.
Peruse reviews from past customers who have flown with Southwest and United Airlines from Fresno to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,243 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Southwest
7.9
Good
4,243 reviews
Southwest
7.9
Good
4,243 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
United Airlines
7.4
Good
9,866 reviews
Southwest
7.9
Good
4,243 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Related info for your journey

Find useful and relevant information for your journey from Fresno to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Fresno to Ontario?

    Airlines like Southwest and United Airlines fly from Fresno to Ontario in about 4h 35m. The time it takes to get you to your destination can typically vary by up to 06m. Fresno and Ontario are separated by a distance of 222 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Fresno to Ontario round-trip?

    Southwest, at $209, was found to be the cheapest airline from Fresno to Ontario. An alternate airline flying to your destination would be United Airlines. Southwest is priced at 50% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Fresno to Ontario that include hotel bookings?

    Yes. In addition to deals on Fresno to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fresno to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Fresno to Ontario.

  • Can I find deals for business class flights from Fresno to Ontario?

    Yes. Cheapflights offers flight deals from Fresno to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Fresno to Ontario?

    Currently, January is the cheapest month in which you can book a flight from Fresno to Ontario (average of $81). Flying from Fresno to Ontario in August is currently the most expensive (average of $656). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Fresno to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Las Vegas flights
San Francisco to Las Vegas flights
San Francisco to Los Angeles flights
Santa Rosa to Las Vegas flights
Ontario to San Francisco flights
Los Angeles to San Francisco flights
San Francisco to Ontario flights
Santa Rosa to San Diego flights
San Jose to Las Vegas flights
San Francisco to San Diego flights
Santa Ana to Las Vegas flights
San Jose to Los Angeles flights
Santa Ana to San Francisco flights
Sacramento to Las Vegas flights
San Francisco to Santa Ana flights
Ontario to Las Vegas flights
Las Vegas to Los Angeles flights
Burbank to Las Vegas flights
Los Angeles to San Jose flights
Oakland to Las Vegas flights
San Diego to San Francisco flights
San Francisco to Burbank flights
San Diego to Las Vegas flights
Los Angeles to Sacramento flights
San Jose to San Diego flights
San Jose to Ontario flights
Las Vegas to San Francisco flights
Burbank to San Francisco flights
Sacramento to San Diego flights
Sacramento to Los Angeles flights
Ontario to San Jose flights
Reno to Las Vegas flights
Los Angeles to Reno flights
Stockton to Las Vegas flights
San Francisco to Palm Springs flights
Oakland to San Diego flights
Santa Ana to San Jose flights
Las Vegas to Reno flights
San Diego to Sacramento flights
Fresno to Las Vegas flights
San Jose to Santa Ana flights
Ontario to Oakland flights
Ontario to Sacramento flights
Las Vegas to Ontario flights
San Diego to San Jose flights
Sacramento to Ontario flights
Las Vegas to Burbank flights
Long Beach to Las Vegas flights
Reno to Los Angeles flights
Long Beach to San Francisco flights

Top 2 airlines flying from Fresno to Ontario

Discover the top 2 airlines that operate flights from Fresno to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$209Average$374FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$290Average$411FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.